A forensic expert is sifting through a two-metre-long "pit" discovered during the excavation of a site that is trying to establish whether the Beaumont children were buried there after they vanished in 1966.
Organisers of the dig, which began on Monday, say there is significant circumstantial evidence that Harry Phipps kidnapped, murdered and buried the three young children of Jim and Nancy Beaumont at his Castalloy foundry in suburban Adelaide.
